Car-truck.



No. 743,756. 4iumrENTzD NW1-o, 19,03.

E. w. SAMEN. A

GAR,A TRUGK.

APELIOATION FILED SEPT. 11, 1902A H0 MIDDEL.

No. maree.

-UNiTnD STATES Patented November 10, 19Q3.

PATENT erich.

CAR-TRUCK.

SPECIFICATION forming part of Letters Patent No: 743,756, dated November 10, 1903. Application iiled September 11, 1902. Serial No. 123,916. (No model.)

To all whom t may concern;

' Be it known that I, EDWARD W. SAMEN, a citizen of the United States, residing at Lasalle, in the county of Lasalle and State of Illinois, have invented new and useful Improvements in Oar-Trucks, of which the following is a specication.-

This invention relates to car-trucks.

The improved car-truck includes in its construction a bolster comprising a compression member having slots in its opposite ends, an arched tension member, the ends of which extend through said slots, faceplates fitting against the ends of the compression member and perforatedto receive said tension member, and means for holding the parts in assembled relation. In the present case the compression member consists of an .1f-section or ordinary I-beam, the web of which is horizontally disposed and the advantages of employing Which Will hereinafter appear, and the tension member consists of a pair of rods arched centrally and disposed in parallelism, and a central support is situated between and cooperates with the compression and tension members, respectively. A bolster constructed as set forth is thoroughly strong and serviceable and is capable of properly resisting the various shocks and strains to which it is subjected in practice.

Other objects and advantages of the invention Will be set forth at length in the following description, While the novelty thereof will constitute the basis of the claims succeeding such description.

The invention is clearly illustated in the accompanying drawings, forming a part of this specication, and in Which- Figure l is a perspective View of the compression member of the bolster. Fig. 2 is a side elevation of said bolster, and Figs. 3 and fl are plan and end views of the same.

Like characters refer to like parts in all the figures.

The bolster includes in its construction a compression member 10, which isshown as consisting of an I-beam of proper length. The web or body of the I-shaped compression member l0 is horizontally disposed. By employing an I-beam as a compression member for the bolster the necessary horizontal and vertical stiffness of the same are secured Without depending upon riveted-up sections to rsecure these results. A common failure of the ordinary iron or steel holsters is that the bolster gives Way or breaks or bends in a .horizontal plane, due to the starting or stopping of the truck, by violently kicking one car against another, and those holsters which are strong enough to resist these strains generally are of the rivetedup class, and they are objectionable, as the rivets shear or are loosened up. Other holsters having channel-beams While strong enough ina horizontal plane are Weak at the side bearings, as in some cases the car is loaded to oneside of the center plate and the truck-bolster carries most of the load on the side bearing under that side of the car, or in rounding a curve at a high speed the weight of body and load is mostly carried on the two outside side bearings. The opposite ends of the compression member lO are slotted, as at 12, the slots having open outer ends coincident with the opposite edges of said compression member, and these slots are adapted to receive the opposite ends of the truss-rods 13, arranged in parallelism below thecompression member 10 and inversely arched, said truss-rods 13 constituting the tension member of the bolster. Face-plates, as 14:, t against the opposite ends of the compressionV member- 10, and the upper faces of the same are flush with each other, and said face-plates are perforated to receive the enlarged threaded ends of the truss-rods 13. Said threaded ends of the trussrods receive nuts 15, by which the parts may be held assembled and which are adapted to -bind against upwardly and inclined faces of bosses 16 on said face-plates surrounding the perforations thereof.

A central support or king-post, as 17, is suitably attached to and depends from the compression member l0 substantially centrally thereof, it having seats in its lower end to receive the truss-rods, and it serves to carry the load from the compression member, asi usual in this class of devices. v

I secure to the opposite ends of the Web of the compression member and upon the npper side thereof rein forcing members 18, suitably secured in place and which may consist of channels or angles secured together to give the desired channel form and which ICG strengthen the compression vmember at its opposite ends. The outer ends of the compression member and reinforcing members 18 are flush with each other, so as to obtain a greater surface against which the face-plates 14 bear.

By slotting the web for the truss-rods in the manner indicated the center of gravity of the compression and tension members is brought as near as possible over the center of load reaction, which is the center of spring'- seats, thereby making it possible to use a lighter section of I-beam than if the center of gravity of rods and beam intersect several inches beyond the center of spring-seats, as they would in case the slots were not present.

The side bearings are denoted by 19, and they are secured upon the upper side of the web of the compression member near the opposite ends thereof, as is customary.

The flanges of the compression member are provided upon their outer sides and at their opposite ends with the usual slide or guide plates 20.

what I through said slots, face-plates fitting against the ends of said compression member. and perforated to receive said tension member, means for holding the parts in assembled relation, and a support between the compression and tension members.

2. In a car-truck, a bolster comprising an I-shaped compression member having slots in the opposite ends of its web, an arched tension member, the ends of which extend through said slots, face-plates tting against the ends of said compression member and perforated to receive said tension member, means for holding the parts in assembled relation, a support between the compression and tension members, and reinforcing-plates secured to theweb of the com pression member and the said face'plates being adapted to abut against said reinforcing-plates.

3. In a car-truck, a bolster comprising an I-shaped compression member having slots in the opposite ends of its web, a tension member the ends of which extend through said slots, means independent of the web for holding the tension member in said slots, and a support between the compression and tension members.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

EDWARD W. SAMEN. Witnesses:

J. E. COLEMAN, rRICHARD YOUNG. 

